User manual

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

FIGURE 2-3: MCP73871 Top Board and Application Circuit.

Resistive Load

E-Load

5V DC

Power Supply

min 2A

Battery or

Battery

Emulation

Circuit

TABLE 2-1: MCP73871 CHARGE STATUS OUTPUTS

Charge Cycle State STAT1 (Green) STAT2 (Red) PG (Blue)

Shutdown OFF OFF OFF

Standby OFF OFF ON

Charge in Progress ON OFF ON

Charge Complete (EOC) OFF ON ON

Temperature Fault ON ON ON

Timer Fault ON ON ON

Low Battery Indicator (LBO) ON OFF OFF

No Battery Present OFF OFF ON

No Input Power OFF OFF OFF

Note: LED Status Outputs are given for the battery connected at V

BAT

and GND.

TABLE 2-2: MCP73871 DEMO BOARD DIP SWITCH CONFIGURATION

Switch # / Name

State / Function

Observations

OFF ON

1 / SEL AC-DC Adapter Power from USB —

2 / PROG2 USB maximum 500 mA USB max 100 mA Only if SEL is ON

3 / TE

Timer Enable OFF Timer Enable activated Factory preset at 4h, 6h and 8h

4 / CE Charge is enabled Charge function OFF CE = Chip Enable